Top 10 Calcium Hardness Increaser – Swimming Pool Balancers

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1. CLOROX Pool&Spa


CLOROX Pool&Spa 12204CLX Calcium Hardness Increaser, 4 lb

CLOROX Pool&Spa #ad - Power source Type: Manual. Increases low Total Hardness levels in swimming pool water. Ideal for plaster pools and soft water areas. Prevents pool surface damage. For best results, use with the Clorox Pool app. Prevents corrosion, etching, and staining.
BrandCLOROX Pool&Spa #ad
ManufacturerClorox® Pool&Spa™ #ad
Height11.5 Inches
Length4.4 Inches
Width10 Inches
Part Number12204CLX

2. SpaGuard


12 Ounce, SpaGuard Spa Calcium Hardness Increaser

SpaGuard #ad - Prevents corrosion of equipment due to low calcium hardness. Per 100 gallons raises calcium hardness 25ppm. 1 tbs. Prevents etching of plaster due to low calcium hardness.
BrandSpaGuard #ad
ManufacturerSpaGuard #ad
Weight0.75 Pounds
Part Number42257BIO
WarrantyReturns are not accepted on opened or used items and are subject to a 20% restocking fee.

3. Pool Mate


25-Pound, Pool Mate 1-2825 Calcium Increaser for Swimming Pools

Pool Mate #ad - Ideal calcium hardness range 200 - 400ppm. Prevents the staining or etching of your pool's surface. Low calcium hardness level can cause corrosive water. Increases Water Hardness.
BrandPool Mate #ad
ManufacturerRobelle Industries #ad
Height11 Inches
Length10.25 Inches
Weight25 Pounds
Width10.25 Inches
Part Number1-2825

4. In The Swim


25 Pound Bucket, In The Swim Pool Calcium Hardness Increaser

In The Swim #ad - Increases calcium hardness level. Prevents aggressive or corrosive water. Do not pre mix. Dosage 6 lbs per 10, 000 gallons to raise calcium hardness level about 50 ppm. Average 97% Calcium Chloride.
BrandIn The Swim #ad
ManufacturerIn The Swim #ad
Part NumberY7210



Leisure Time CB Calcium Booster Balancer for Spas and Hot Tubs, 32 fl oz

LEISURE TIME #ad - Features: prevents corrosion and foam; Part of Leisure Time's Simple Spa Care program. One ounce increases hardness 7 ppm in 500 gallons of water. Includes: one 32-oz bottle of Leisure Time Calcium Booster. Prevents corrosion. Benefits: raises water hardness to maintain a level of hardness between 150-400 ppm. Compatible with chlorine, bromine, ozone and biguanide sanitizers. Use: one ounce increases hardness 7 ppm in 500 gallons of water. Compatibility: Compatible with chlorine, bromine, ozone, and biguanide sanitizers.
ManufacturerLeisure Time #ad
Height9.5 Inches
Length3.12 Inches
Weight2.58 Pounds
Width3.12 Inches
Part NumberCB

6. Robelle


Robelle 2808B Calcium Hardness for Swimming Pools, 8-Pounds

Robelle #ad - Ideal calcium hardness range 200 - 400ppm. Increases Water Hardness. Prevents the staining or etching of your pool's surface. Low calcium hardness level can cause corrosive water.
BrandRobelle #ad
ManufacturerRobelle #ad
Height10 Inches
Length10 Inches
Weight8 Pounds
Width10 Inches
Part Number2808B



Leisure Pool 50 lb. Calcium Hardness Increaser Calcium Chloride

LEISURE POOL & SPA SUPPLY INC. LP #ad - Dosing instructions: 1. 1 lb. Other uses: ice melt, dust control, concrete acceLERATOR. Calcium chloride dry granules commonly known as Calcium Hardness Increaser, will raise calcium hardness levels in commercial and residential swimming pools and spas. Per 10, 000 gallons will raise CH levels by 10 ppm.
ManufacturerLeisure Pool & Spa Supply, Inc. #ad
Height15 Inches
Length12 Inches
Weight50 Pounds
Width12 Inches

8. HTH


HTH 67019 Calcium Hardness Up Balancer for Swimming Pools, 4 lbs

HTH #ad - Compatibility: Great for vinyl-lined pools and saltwater systems. Features: raises calcium hardness; Reduces corrosiveness of water with low calcium; Avoid damage to pool surfaces and equipment; Resealable bag. Includes: one 4-lb container of Calcium Hardness Up granules for your swimming pool water. Benefits: ensures that your swimming pool has a balanced calcium hardness so you can enjoy splashing in the water all season long in healthy water. Use: apply to pool following instructions for easy DIY pool care; For best results, use with other HTH pool care products.
BrandHTH #ad
ManufacturerInnovative Water Care #ad
Height11 Inches
Length4.5 Inches
Width7.5 Inches
Part Number67019

9. Rx Clear


Rx Clear Calcium Plus | Granular Calcium Chloride | Raises Calcium in Swimming Pool Water | Hardness Increaser for Swimming Pools | Prevents Corrosion | 25 Lbs

Rx Clear #ad - Six lbs. Raising calcium hardness helps prevent corrosion of metal and plaster surfaces. Add when water hardness levels drop below 150 ppm. Also helps prevent foaming of certain chemicals. Prevents corrosion - rx clear calcium plus helps stop corrosion of metal surfaces such as light fixtures, pool cover components, ladders, pool heater components, and metals in your pump or filter.

Do not pre dissolve this product. Per 10, 000 gallons will raise the hardness level approximately 50 ppm. Be aware - do not add this product on the same day that either ph plus or alkalinity increaser has been added to the pool water. Calcium plus - use rx clear swimming pool calcium booster when the calcium hardness reading in your pool drops below 150ppm. Also prevents etching, and delamination of concrete, pitting, railings, gunite, plaster, screws, shotcrete, and fiberglass pools.

The minimum calcium hardness level is 150 ppm. Water chemistry - one of the most important aspects of proper swimming pool care involves the maintenance of balanced water chemistry. Trust rx clear as the most reliable leader in pool cleaner products and supplies. Dosage - the ideal range is 200 to 400 parts per million ppm. When swimming pool chemicals are not at their ideal levels, and pool or spa equipment, the water can turn dull and cloudy, hoses, swimmers can be at risk of contracting illnesses and suffering from skin irritation, and surfaces can become damaged.
BrandRx Clear #ad
ManufacturerRx Clear #ad

10. HTH


Hth Pool Balance Calcium Hardness Increase 67008

HTH #ad - Prevents corrosion of metal & plaster surfaces. Low calcium hardness may cause the pool water to be corrosive, resulting in damage to pool surfaces and equipment. Hth calcium hardness increaser, 4 lbs. Raises calcium hardness levels. Compatible with Salt Systems.
BrandHTH #ad
ManufacturerHTH #ad
Height10 Inches
Length5.85 Inches
Weight4.3 Pounds
Width5.85 Inches
Part Number67008